Ore-concentrator belt.



T. R. BROOKS 85 G. E. BATEMAN.

ORE OONGENTRATOR BELT.

APPLICATION FILED AUG. 4, 1908.

Patented Au 24, 1909.

IN VENTOR.

WITNESSES. 0am %Q/&

ANDREW. a. Gmmm co. PHOTOLIIHOGRAPHERS.4ASKINSION. n. c.

UNITED STATE PATENT rice.

THADDEUS R. BROOKfi AND GEORGE E. BATEMAN, 81F SAN FRANCISCO, CALIFORNIA.

'ORE-CONCENTBATOR BELT.

Specification of Letters Patent.

Patented Aug. 24, 1999.

Application filed August 4, 1908. Serial No. 446,85.

To all whom it may concern:

Be it known that we, THADDEUS R. BROOKS and GEORGE E. BATEMAN, citizens of the United States, residing in the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Ore-Concentrator Belts of which the following is a specification.

Our invention relates to belts for that class of ore concentrators, known as endless belt concentrators, wherein the belt is caused to travel ever end rolls during the swinging or shaking movement of the concentrator bed; the invention pertaining more particularly to the construction of the side edge flanges of the belt, which is generally the weakest portion of the belt and the first to give under the strains placed thereon. Ordinarily the side edge flanges of such belts consists of rubber projections vulcanized to the side edges thereof, in some cases'the duck plies of the belt being extended into the side edge flanges, and in others there being inserted within the flanges longitudinally extended cords, springs or ropes, the purpose in each case being an endeavor to provide against the cracking of the side flange and the breaking thereof from the body of the belt, as the same travels over the forward end roll of the concentrator.

Practice has demonstrated that the side edge flanges of the belts now in use, are short lived, due in some cases to the flanges cracking as carried over the end roll, and in others to the flanges pulling away from the belt body as thrown down while passing over said roll.

The object of our invention is to so construct the side edge flanges as to permit the same giving in all directions as carried over the forward end roll of the concentrator and to assume their normal position when carried beyond the sphere of such roll, while at the same time, causing a portion of the body of the belt proper to form the outer rolled surface of the side edge flanges.

To comprehend the invention, reference should be had to the accompanying sheet of drawings, wherein:

Figure 1 is a broken perspective view disclosing the belt as applied to the forward end roll of a belt concentrator. Fig. 2 is a cross sectional view of the improved belt.

In the drawings, the numeral 1 is used to indicate the belt proper, and 2 the side edge flanges thereof. Within each side edge flange, is embedded an inner hollow core piece 3, composed of composite rubber tubing extended throughout the length of the belt. This tubing is composed of layers of textile fabric and layers of rubber, corre sponding to the construction of the belt.

The rubber tubing or hollow core piece 3, is held in place by the extended sideportions of the belt 1, being rolled or formed thereover, the free portion thereof, being carried beneath the belt proper and vulcanized to the under surface thereof, for a dis tance of approximately four inches, more or less, from the side edge flanges 2, said free portion extending parallel to the body portion of the belt and being tapered toward the center of said body portion. By this construction, a longitudinally disposed air cushion is formed Within the side edge flanges extending wholly above the upper surface of the belt proper, which allows of the flattening of the side flanges as the belt is carried over the end roll 4 of the concentrator, and serves to take up the strain placed onto the side edge flanges during such travel of the belt, at the same time permitting of the belt giving longitudinally, while describing its circular path over the said end roll. The side edge flanges thus have not only the resistance offered by the textile fabric of the belt itself, but likewise that of the fabric contained within the tubular core piece 3. Inasmuch as the longitudinally disposed tubular core piece is enveloped within por tions of the belt itself, the same cannot break or 1pull away unless the belt itself 'ives, which wil not take place until the be t wears out by usage. The life of the belt is thus materially prolonged, its elasticity increased, the giving quality of the side edge flanges enhanced, and the strength of the said flanges maintained in proportion to that of the belt.

Having thus described the invention, what is claimed as-new and desired to be protected by Letters Patent is 1. In a concentrator belt, the combination of a body portion having at its opposite sides return bent portions forming loops, tubular core members fitted in the loops with their under surfaces normally extending in the same plane as said body portion, the return bent portions extending a substantial distance to one side of the core members throughoutthe body of the belt flat against the underside thereof and constituting a reinforcing means for the upper surface thereof substantially throughout its width and said return bent portions gradually tapering inwardly,- whereby the same will in effect constitute a continuation of the lower surface of the belt and the latter will be free from protuberances.

2. In combination with a concentrator having a roll of the same thickness throughout its length, of a belt therefor comprising an endless body part adapted to travel over said roll, tubular core members extending longitudinally of the body part and in a transverse direction to the roll, the body part having at its respective sides loops ex tending around said tubular core members and the free ends of the loops being secured to the under surface of the body portion whereby the loops with said body will constitute a continuous unbroken engaging surface to engage the roll surface and whereby said free ends will constitute a reinforce for the body portion for a substantial distance throughout its Width.

3. A belt for ore concentrators composed of layers of rubber and reinforcing layers of textile fabric, said belt having its side edge portions rolled over and secured to the under esrooi surface of the body of the belt to provide side edge flanges of looped formation, the reinforcing layers of textile fabric extending continuously throughout the body of the belt and completely around and throughout the looped side edge flanges.

4. A belt for ore concentrators composed of layers of rubber and reinforcing layers of textile fabric, said belt having its side edge portions rolled over and secured to the under surface of the body of the belt to provide side edge flanges of looped formation, the reinforcing layers of textile'fabric extending continuously throughout the body of the belt and completely around and throughout the looped side edge flanges, and longitudinally disposed core pieces enveloped by the looped side edge flanges.

1n testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

THADDEUS R. BROOKS. GEORGE E. BATEMAN.

Witnesses:

N. A. AoKER, D. B. RICHARDS. 

